Can the continuous form be combined with the passive voice?
Solution 1:
The first site is wrong:
- He has been being treated for imbecility for almost twenty years and has not yet recovered his wits.
- In 2007 he had been being treated for imbecility for ten years and had not yet recovered his wits.
- He will be being treated for imbecility on Monday when you arrive, and may not be able to greet you.
- By then he will have been being treated for imbecility for twenty years.
What is true is that these constructions are rarely needed.